Pinpoint Test

CLEAR DTCs
1. Ignition ON.
2. Using a scan tool, clear all DTCs .
3. Using a scan tool, perform a HVAC module self-test.
  Is DTC U3003:16 or U3003:17 present?
  - Yes: GO to 2 .
  - No : The system is operating normally at this time. The DTC may have been set due to a previous battery condition.
RETRIEVE PCM DTCs
1. Start the engine.
2. Using a scan tool, perform PCM self-test.
  Are any charging system DTCs present in the PCM?
  - Yes: REFER to SYMPTOM CHART: CHARGING SYSTEM for diagnosis of the battery and charging system.
  - No : GO to 3 .
CHECK BATTERY CONDITION
1. Ignition OFF.
2. Carry out the Battery Condition Test. REFER to DIAGNOSTIC ROUTINE A : Battery Condition Test.
  Does the battery pass the condition test?
  - Yes: GO to 4 .
  - No: INSTALL a new battery. REFER to REMOVAL AND INSTALLATION .
CHECK THE CHARGING SYSTEM VOLTAGE
NOTE: Do not allow the engine RPM to exceed 2, 000 RPM while carrying out this step or the generator may self-excite, resulting in default charging system output voltage. If engine RPM has exceeded 2, 000 RPM, shut the vehicle off and restart the engine before carrying out this step.
1. Start the engine.
2. Measure the voltage of the battery:
  - For DTC U3003:17, turn off all accessories and run the engine at 1, 500 RPM for a minimum of 2 minutes.
  - For DTC U3003:16, turn on headlights and HVAC fan on high and run engine at 1, 500 RPM for a minimum of 2 minutes.
3. Is the battery voltage between 13-15.2 volts?
  - Yes: For DTC U3003:16, GO to 5 .
    For DTC U3003:17, GO to 7.
  - No : REFER to SYMPTOM CHART: CHARGING SYSTEM to diagnose the charging system.

CHECK THE HVAC MODULE VOLTAGE SUPPLY CIRCUIT FOR HIGH RESISTANCE

Ignition OFF.
Measure and record the voltage at the battery.
Disconnect: HVAC Module C228A.
Ignition ON.

Measure:

HVAC Module			Ground

C228A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
26	SBP46 (BN/RD)		-	Ground

Is the voltage within 0.2 volt of the recorded battery voltage?

Yes: GO to 6 .
No : REPAIR the circuit.

CHECK THE HVAC MODULE GROUND CIRCUIT FOR HIGH RESISTANCE

Ignition OFF.

Measure:

HVAC Module			Ground

C228A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
10	GD215 (BK/GY)		-	Ground

Is the resistance less than 3 ohms?

Yes: GO to 7 .
No : REPAIR the circuit.

CHECK FOR CORRECT HVAC MODULE OPERATION
1. Ignition OFF.
2. Disconnect and inspect all HVAC module connectors.
3. Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged or bent pins - install new terminals/pins
  - pushed-out pins - install new pins as necessary
4. Reconnect the HVAC module connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
  Is the concern still present?
  - Yes: CHECK OASIS for any applicable TSBs . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module. REFER to Heating Ventilation Air Conditioning (HVAC) Module .
  - No : The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.